EP1008285A1 - Attachable mowing device - Google Patents

Abstract

In relation to the articulated chain comprising the coupling device (8) or tractor trailer, the articulated connection (7) with its vertical axis, the draw bar (6), the articulated connection (12) and its vertical axis as well as the mower assembly (3) an articulated connection is made with a horizontal axis which in the work position is parallel to the travel direction. The articulated connection with the horizontal axis is in relation to the chain behind or in the articulated connection or in an area at most a third of the distance between the articulated joints (7, 12).

Description

The invention relates to attachable mowers, in particular rotary mowers, for the attachment to tractors.

From DE 40 19 948 C2 an attachable mower is according to the Generic preamble of claim 1 known, which has a Drawbar is connected to the tractor. The mower is also on the drive side the PTO shaft of a tractor. In particular mowers with Large working widths from 2.5 meters are often with integrated conditioners equipped, which increases their weight.

In particular because of the weight forces, mowers are used for larger ones Working widths designed as attachable mowers, making their Then the weight is not transferred to the tractor, but by Jockey wheels are supported directly on the floor.

If the permissible transport width is exceeded in the working position, Trailed mowers designed so that the cutting unit around a vertical axis can be pivoted to the extent that the permissible in the transport position Transport width is not exceeded.

The trailer device shown and described in DE 40 19 948 C2 An integrated mower has two angular gears in its drive train on, on the one hand a bevel gear on the tractor side, on the other hand a device-side bevel gear, which serve to attach a trailer create that with a small turning radius any work and Transport positions with simultaneous drive behind the tractor in relation to to be able to take the tractor center axis.

The object of the invention is to provide an attachable mower, which by the type of constructive training of the supporting structure of the Mowing unit a particularly simple tractor-independent Ground adaptation of the mower to uneven ground across the direction of travel enables in the working position, this equally the Improved trailing properties of the mower unit in the transport position, and which in a particularly advantageous manner a simple actuator for Moving the mower from transport to working position and vice versa Connection with a simple drive train between the tractor and Mowing unit enables. In addition, the constructive training of Support structure according to the invention a short length of the drawbar, which is the length of the trailer, consisting of tractor and attached mower, minimized.

This task is solved with the characteristics of the characteristic part of the Claim 1. The further embodiment of the invention is the following Description, the drawings and claims 2 to 8 can be found.

An attachable mower according to the invention consists of a Support structure with one in the working position transverse to the direction of travel aligned main beam on which the cutting unit can move vertically is coupled. Attached and towed mowers need for the purpose the optimal ground adaptation with regard to their orthogonal spatial axes three degrees of freedom of the rotary movements, on the one hand the driving movements to be able to follow the tractor in an adapted caster curve and to others to make it independent of tractor pitch and roll movements do.

The main carrier of a mower is part of the supporting structure articulated around a horizontal axis, which in the working position is approximately parallel to Direction of travel is aligned, connected to a support wheel carrier. At the back End of the support wheel carrier is one of the two support wheels, which is the inner one Represents the mower's support wheel in the working position, attached and on front end of the jockey wheel carrier is with the drawbar by means of a Articulated connection, which has a vertical axis, connected. This Articulated connection is in the working as well as in the transport position bridged, so that the pivoting of the drawbar only for Conversion from transport to work position and vice versa is released.

At the outer end of the main carrier is the second support wheel as an outer support wheel the mower is attached in the working position by means of a jib, the main beam being articulated to the jockey wheel boom is connected and this articulation has a vertical axis. This Articulated connection is in the working as well as in the transport position bridged so that the pivoting mobility of the jockey wheel only for Conversion from transport to work position and vice versa is released.

Both articulated connections using the drawbar as a connecting element the jockey wheel carrier and that of the jockey wheel boom with the main carrier bridged by pressure medium cylinders, which by control by means of Directional valves of a tractor for changing from transport to work position and conversely, be pressurized accordingly. So that serve Pressure cylinder on the one hand as a locking device for suppressing the Pivotal mobility of these articulations and on the other hand as Actuator for pivoting the mower from the transport position in the working position and vice versa.

The position of the vertical axis of the joint between the drawbar and Jockey wheel carrier enables a particularly favorable position of an angular gear as a swivel gear, which is attached directly to the mowing unit and with this is attached and which part of the drive train between the PTO shaft of a tractor and the mowing rotors of a mower unit. The favorable position of the slewing gear in connection with the position of the Vertical axis of the articulated connection between the drawbar and the support wheel carrier enables a particularly simple drive shaft connection between the PTO shaft of the tractor and the input shaft of the slewing gear.

This training of the supporting structure and in particular the vertical axis of the Connecting joint between the drawbar and the support wheel carrier allows a short drawbar length with a small angle to the Direction of travel, so that those attacking the mower and the tractor Lateral forces perpendicular to the direction of travel are kept low.

Another advantage of the invention is that by the type of articulation the drawbar to the supporting structure of the mower the main carrier of the Support structure in the transport position approximately parallel to the direction of travel is aligned, whereby the transport width is minimized and by the particularly short length of the drawbar the transport length is also short.

Reference list

1 -

Mower

2 -

tractor

3 -

Cutting unit

4 -

Supporting structure

5.5 '-

Jockey wheel

6 -

Drawbar

7 -

Articulated connection

7 '-

Vertical axis

8th -

Coupling device

9 -

Lower link

10 -

PTO

11 -

PTO shaft

12 -

Articulated connection

12 '-

Vertical axis

13.13 '-

Pressure cylinder

14.14 '-

Upright

15 -

Mowing device

16 -

Conditioner

17 -

Tine rotor

18 -

Slewing gear

19 -

V-belt drive

20 -

Articulated connection

20 '-

Vertical axis

21 -

Main beam

22 -

boom

23.23 '-

Parallelogram handlebar

24 -

Pressure cylinder

25.25 '-

Locking device

26 -

Jockey wheel boom

27 -

Tension springs

28 -

Jockey wheel carrier

29 -

Articulated connection

29 '-

Horizontal axis

30 -

Pitch axis

31 -

Pitch axis

F -

Direction of travel

α -

Swivel angle

Fig. 1 -

Ein an einen Traktor (2) angehängtes Mähwerk (1) in der Draufsicht in Fahrtrichtung (F).

Fig. 2 -

Schnitt A-A gemäß Fig. 1

Fig. 3 -

Schnitt A-A gemäß Fig. 1 jedoch mit angehobenem Mähaggregat (3)

Fig. 4 -

Mähwerk (1) in der Draufsicht auf die Fahrbahnebene mit einem Traktor (2) gekoppelt in Transportstellung

Fig. 5 -

Tragkonstruktion (4) im angehängten Zustand an den Traktor (2) ohne Mähaggregat in Arbeitsposition

Fig. 6 -

Tragkonstruktion (4) ohne Mähaggregat in der Transportstellung in der Draufsicht

Fig. 7 -

Eine vergrößerte Darstellung der Tragkonstruktion (4) in der Draufsicht gemäß Fig. 5

Fig. 8 -

Eine vergrößerte Darstellung der Tragkonstruktion (4) in der Draufsicht gemäß Fig. 6

Fig. 9 -

Eine vergrößerte Darstellung der Tragkonstruktion (4) in der Draufsicht gemäß Fig. 5 als Variante zu Fig. 7

Fig. 10 -

Eine vergrößerte Darstellung der Tragkonstruktion (4) in der Draufsicht gemäß Fig. 6 als Variante zu Fig. 8

Show it:

Fig. 1 -

A mower (1) attached to a tractor (2) in plan view in the direction of travel (F).

Fig. 2 -

Section AA according to FIG. 1

Fig. 3 -

Section AA according to FIG. 1 but with the mowing unit (3) raised

Fig. 4 -

Mower (1) in plan view of the road level coupled to a tractor (2) in the transport position

Fig. 5 -

Support structure (4) in the attached state to the tractor (2) without cutting unit in working position

Fig. 6 -

Top view of the support structure (4) without the mowing unit in the transport position

Fig. 7 -

An enlarged view of the support structure (4) in the plan view according to FIG. 5

Fig. 8 -

An enlarged view of the support structure (4) in the plan view according to FIG. 6

Fig. 9 -

An enlarged representation of the support structure (4) in the top view according to FIG. 5 as a variant of FIG. 7

Fig. 10 -

An enlarged representation of the support structure (4) in the top view according to FIG. 6 as a variant of FIG. 8

Fig. 1 shows a mower (1) attached to a tractor (2) in plan view in the direction of travel (F). The mowing unit (3) is in a supporting structure (4) mounted. The supporting structure (4) is supported on the floor Support wheels (5.5 '). The support structure (4) is by means of a drawbar (6) coupled to the tractor (2). The drawbar (6) is in the Articulated connection (7), designed as a vertical axis (7 '), by means of a Coupling device (8) with the tractor (2) in the lower links (9) of the Tractor (2) coupled. Mower deck drive (1) takes place from the PTO shaft (10) of the tractor (2) by means of an articulated shaft (11).

The articulation (12) with the vertical axis (12 ') of the drawbar (6) is through bridged a pressure medium cylinder (13) in the illustrated working position. The support wheels (5,5 ') are in the working position shown around their respective Vertical axes (14, 14 ') with the locking device (25, 25') so that the Mower (1) in the direction of travel (F) laterally offset from the tractor (2) through the support wheels (5,5 ') parallel to the direction of travel (F). The jockey wheel (5) is supported against the ground by means of the support wheel carrier (28), and that Support wheel (5 ') by means of the support wheel boom (26).

In the illustrated embodiment of a mower (1) around a rotary mower with four rotary rotors (15) and an integrated one Conditioner (16) with a tine rotor (17). The propeller shaft (11) drives in Swivel gear (18), designed as an angular gear, the mower (1) and over the V-belt drive (19) to the conditioner (16). The nature of this constructive Training gives the mower (1) with its support structure (4) two Pitch axles, on the one hand the pitch axis (30), which at the same time the wheel axles the support wheels (5,5 '), and on the other hand the pitch axis (31), which the Connection line of the ball joints of the two lower links (9). Thereby condenser (2) and attached mower (1) can work independently perform pitching movements from each other.

Fig. 2 shows the section A-A according to Fig. 1. The mowing unit (3) is with the Parallelogram links (23, 23 ') with the arm (22) of the supporting structure (4) articulated coupled. The boom (22) forms a rigid connection with the Main beam (21) of the supporting structure (4). Mower unit (3) and conditioner (16) form a unit, so that this unit with the pressure medium cylinder (24) is coupled so that this unit from the working to the transport position is raised against the floor. In Fig. 2 the cutting unit (3) is on the Floor supported in the working position.

FIG. 3 shows the section A-A according to FIG. 1 but with the mowing unit raised (3). In this raised state, the mower (1) can be in its Transport position can be swiveled.

In Fig. 4, the mower (1) in plan view of the road level with a Tractor (2) shown coupled in transport position. The support wheels (5,5 ') are around their vertical axes (14, 14 ') by means of a locking device (25, 25') noticeable. The locking devices (25, 25 ') can, for example, in known to be designed as a manually operated locking device, such that a snap bolt in a bore of a segment plate engages, with the segment plate around the vertical axis of the support wheels (5,5 ') this can rotate, and the snap bolt on the support structure (4) supports. After loosening the locking devices (25,25 ') the Support wheels (5,5 ') by operating the pressure medium cylinders (13,13') freely around their Swivel up axles (14, 14 ') so that the mower (1) is horizontal overall can pivot about 90 ° about the vertical axis (12 ') of the drawbar (6).

With the pressure medium cylinder (13 '), the support wheel boom (26) by means of Articulated connection (20) about the vertical axis (20 ') in the transport position be moved by moving the jockey wheel arm (26) by the swivel angle (a), about 150 °, is pivoted. In this transport position of the jockey wheel boom (26) the support wheel (5 ') is locked by means of its locking device (25'). This creates a favorable overrun behavior of the mower (1) compared to Tractor (2). The support wheel (5), however, is free around its vertical axis (14) pivotable, so that the locking device (25) in the transport position the support wheel (5) does not take any locking function.

With the tension springs (27) a part of the weight of the mowing unit (3) supported on the main support (21) of the supporting structure (4), so that a Most of the weight of the cutting unit (3) on the support wheels (5,5 ') is transmitted.

5, the supporting structure (4) in the attached state to the tractor (2) shown in the working position without the cutting unit. The main beam (21) is with the support wheel carrier (28) by means of an articulated connection (29) with the Horizontal axis (29 ') articulated. The articulated connection (29) enables the main beam (21) to pivot around the horizontal axis (29 '). This enables the tractor to adapt to the ground independently of the tractor Mower unit (3) on bumps across the direction of travel.

Fig. 6 shows the support structure (4) without mowing unit in the transport position in the top view. Due to the location of the vertical axes (7 '; 12', 20 ') of the Articulated connections (7, 12, 20) in connection with the vertical axes (14, 14 ') of the Support wheels (5.5 ') and the locking devices (25.25'), in connection with the Pressure medium cylinders (13, 13 ') enable this design of the supporting structure (4) the orientation of the main beam (21) approximately parallel to the direction of travel (F), which has a particularly narrow transport width in connection with a favorable tracking behavior of the supporting structure (4). This enables a favorable load distribution on the support wheels (5) or (5 ').

Fig. 7 shows an enlarged view of the support structure (4) in the Top view according to FIG. 5.

Fig. 8 shows an enlarged view of the support structure (4) in the Top view according to FIG. 6.

Fig. 9 shows an enlarged view of the support structure (4) in the Top view analogous to FIG. 5 as a variant of FIG. 7. The variant consists in that the articulated connection (29) with its horizontal axis (29 ') and the Joint connection (12) with its vertical axis (12 ') together a universal joint form so that the vertical axis (12 ') and the horizontal axis (29') one have a common intersection.

Fig. 10 shows an enlarged view of the support structure (4) in the Top view analogous to FIG. 6 as a variant of FIG. 8 with the design of the Articulated connections (12, 29) according to FIG. 9.

Overall, the coupling device (8) or tractor attachment form the Articulated connection (7) with its vertical axis (7 '), the drawbar (6) with the Articulated connection (12) and its vertical axis (12 ') and the mowing unit (3) with its supporting structure (4) and the horizontal axis (29 ') of the articulated connection (29) an articulated chain, which swivels the mower (1) from the work the transport position and vice versa. In addition, it offers Horizontal joint (29) with the horizontal axis (29 ') in the working position of the Mower (1) has the advantage that by decoupling the rotary movements between the mowing unit (3) and the drawbar (6) a quick ground adaptation is achieved, which is due to the fact that the Mass moment of inertia of the cutting unit (3) in the plane transverse to Direction of travel around the horizontal axis (29 ') is less than a comparable one Mass moment of inertia of the mower (1) about a horizontal axis, which in Area of the coupling device (8) approximately in the area of the central axis of the Tractor (2) would lie.

This also applies analogously in the transport position when the floor is uneven to the direction of travel (F), so that it is also in the transport position of the mower (1) through the horizontal axis (29 ') the articulation (29) a quick Adaptation to the ground in the event of uneven ground, which the support wheels must follow and the result is a more favorable distribution of forces within the Supporting structure (4) results. This also helps improve Driving characteristics and thus the smooth running of the mower.

As an alternative to manually operated locking devices (25, 25 '), these can be used can also be operated, for example, by pressure medium cylinders. That’s it possible to control the mower (1) remotely from the tractor cabin of the tractor (1) to be completely controlled, including the changeover from work to Transport position and vice versa. This also increases the Ease of use for handling and controlling the mower (1).

The structural design of the supporting structure (4) enables a parallel Alignment of the main beam (21) to the direction of travel (F) in connection with a small transport width and a short drawbar (6), which at the same time increases road safety on public roads and paths.

Claims (10)

Attachable mower (1) with two support wheels (5,5 '), a mower unit (3) with mower rotors (15) which can be driven by the PTO shaft (10) of a tractor (2), the support wheels (5,5') of which are attached to a supporting structure ( 4) are attached in such a way that the mowing unit (3) can either be lowered into a working position or raised to a transport position by means of an actuator for changing the altitude, the mower (1) using a drawbar (6) directly or indirectly by means of a Coupling device (8) - can be attached to a tractor (1) in such a way that the tractive force of a tractor (1) can engage the drawbar (6) of a mower (1) via an articulated connection (7) with the vertical axis (7 '), and the drawbar (6) on the implement side is connected to the mowing unit (3) by means of an articulated connection (12) by means of the vertical axis (12 ') such that the pivoting mobility of the drawbar (6) about the vertical axis (12') of the articulated connection (12) by means of a locking device ng optionally, either for the purpose of changing the orientation of the mowing unit (3) in the working or transport position, or can be prevented in the respective working or transport position, characterized in that in relation to the articulated chain, consisting of a coupling device ( 8) or tractor attachment, the articulated connection (7) with its vertical axis (7 '), the drawbar (6), the articulated connection (12) and its vertical axis (12') and mowing unit (3) an articulated connection (29) with a horizontal axis (29 '), the horizontal axis (29') in the working position of the mower (1) being oriented approximately parallel to the direction of travel (F) and the articulated connection (29) with its horizontal axis (29 ') behind or in relation to the articulated chain lies in the articulated connection (12) or is arranged in front of the articulated connection in a region of at most one third of the distance between the articulations (7, 12). Attachable mower (1) with two support wheels (5,5 '), a mower unit (3) with mower rotors (15) which can be driven by the PTO shaft (10) of a tractor (2), the support wheels (5,5') of which are attached to a supporting structure ( 4) are attached in such a way that the mowing unit (3) can either be lowered into a working position or raised to a transport position by means of an actuator for changing the altitude, the mower (1) using a drawbar (6) directly or indirectly by means of a Coupling device (8) - can be attached to a tractor (1) in such a way that the tractive force of a tractor (1) can engage the drawbar (6) of a mower (1) via an articulated connection (7) with the vertical axis (7 '), and the drawbar (6) on the implement side is connected to the mowing unit (3) by means of an articulated connection (12) by means of the vertical axis (12 ') such that the pivoting mobility of the drawbar (6) about the vertical axis (12') of the articulated connection (12) by means of a locking device ng optionally, either for the purpose of changing the orientation of the mowing unit (3) can be released in the working or transport position, or can be prevented in the respective working or transport position, characterized in that the supporting structure (4) essentially consists of a main carrier (21) and a support wheel carrier (28) and the first support wheel (5) is pivotably or fixably mounted about a vertical axis (14), and the second support wheel (5 ') is pivotable at the free end of a pivotable support wheel arm (26). or is fixed about a vertical axis (14 '), and the support wheel arm (26) in the articulated connection (20) is pivotally connected to the main support (21) by the pivoting angle (a) about the vertical axis (20'). A trailer mower according to claim 1 or 2, characterized in that the articulated connection (12) between the drawbar (6) and the support wheel carrier (28) can be bridged by means of a pressure medium cylinder (13) about the vertical axis (12 '), the pressure medium cylinder (13 ) can also be used as an actuator for swiveling the mower (1) from the transport to the working position and vice versa. A trailer mower according to claim 1 or 2, characterized in that the articulated connection (20) between the main support (21) and the support wheel arm (26) can be bridged by a pressure medium cylinder (13 ') so that it can be locked around the vertical axis (20'), and the pressure medium cylinder ( 13 ') can be used as an actuator for pivoting the support wheel (5') from the transport to the working position and vice versa. A trailer mower as claimed in claim 1 or 2 in conjunction with one or more of claims 3 to 4, characterized in that the support wheels (5,5 ') are articulated on the supporting structure (4) so as to be pivotable about their vertical axes (14, 14') and the support wheels (5,5 ') around their vertical axes (14,14') are equipped with a locking device (25,25 ') so that the swiveling mobility of the wheels (5 or 5') can either be released or prevented. A trailer mower (1) according to claim 5, characterized in that the locking device (25, 25 ') can be actuated by a pressure medium cylinder and can thus be controlled by remote control. Attachable mower according to claim 1 or 2 in connection with one or more of claims 3 to 6, characterized in that the swivel gear (18) as part of the drive train between the PTO shaft (10) of the tractor (1) and the mower unit (3) on the mower unit side is arranged. A trailer mower (1) according to claim 1 or 2 in conjunction with one or more of claims 3 to 7, characterized in that the second support wheel (5 ') can perform pivoting movements about the horizontal axis (29') independently of the first support wheel (5) . Attachable mower (1) according to claim 1 or 2 in connection with one or more of claims 3 to 8, characterized in that the swivel angle (a) of the support wheel carrier (26) is greater than 90 °. Attachable mower (1) according to claim 1 or 2 in connection with one or more of claims 3 to 9, characterized in that the swivel angle (a) of the support wheel carrier (26) is in the range 120 ° to 180 °.

Images